DTIC ADA500184: The Coast Artillery Journal. Volume 59, Number 4, October 1923 (1923)
Defense Technical Information Center · leaf 46
feet above the level of the pool. This D. P. F. is an old 1908 azimuth instrument (Figure 1), which has been altered bv the addition of an elevating scale so that the instrument accurately reads ranges to the different targets. The duties of the observer and reader are identical to those when man¬… … Fig. 2. View of Pool with Ship Models stations as rnav be called for by the particular problem. A plotting board is installed adjacent to the D. P. F. Here arm setters, plot¬ ters, assistant plotters, readers, recorders, in fact the entire range detail work with actual data obtained from…
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